CN103529241A - Interface circuit for acceleration sensor - Google Patents
Interface circuit for acceleration sensor Download PDFInfo
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- CN103529241A CN103529241A CN201310501765.9A CN201310501765A CN103529241A CN 103529241 A CN103529241 A CN 103529241A CN 201310501765 A CN201310501765 A CN 201310501765A CN 103529241 A CN103529241 A CN 103529241A
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Abstract
The invention discloses an interface circuit for an acceleration sensor. The interface circuit comprises a shaping filtering circuit and an operational amplifier, wherein the non-inverting input end and the output end of the operational amplifier are connected through a resistor R4; the non-inverting input end of the operational amplifier is connected onto the cathode of a diode, and the anode of the diode is grounded; and the input port of the shaping filtering circuit and power supply are connected through a resistor R1, and the output end of the shaping filtering circuit is connected onto the non-inverting input end of the operational amplifier. The interface circuit for the acceleration sensor has the advantages that filter shaping and hysteresis comparison are performed on acquired signals, so that data cannot be lost even at a very low wheel rotation speed, and data reliability is guaranteed.
Description
Technical field
The present invention relates to a kind of interface circuit, relate in particular a kind of interface circuit for acceleration transducer.
Background technology
Acceleration transducer is a kind of electronic equipment that can acceleration measurement power.It is widely used in the various electronic such as automobile, mobile phone, PAD.For example be used in upset detection, collision detection, brake control system etc.When to wheel speed information, if wheel speed is extremely low, be easy to cause the loss of data, the monitoring of acceleration is impacted, make to monitor out of true.
Summary of the invention
The invention provides a kind of interface circuit for acceleration transducer, it carries out filter shape and relatively sluggish to the signal gathering, and wheel speed data under extremely low rotating speed also can not lost, and guarantees the reliability of data.
For solving above-mentioned technical matters, the present invention by the following technical solutions:
For the interface circuit of acceleration transducer, it comprises plastic filter circuit and operational amplifier; Between the in-phase input end of described operational amplifier and output terminal, be connected with resistance R 4; The in-phase input end of described operational amplifier connects on the negative pole of diode, the plus earth of described diode; Between the input port of described plastic filter circuit and power supply, be connected with resistance R 1, the output terminal of described plastic filter circuit is connected on the in-phase input end of operational amplifier.In the present invention, operational amplifier and resistance R 4 form hysteresis comparator circuit, and the voltage of diode pair operational amplifier in-phase input end carries out clamper, and operational amplifier is protected.Adopt filtering shaping circuit and hysteresis comparator circuit to carry out acquisition and processing to data, can effectively guarantee not losing of data, even in the situation that tach signal is extremely low, guarantee the reliability of data.
Further technical scheme is:
As preferably, described plastic filter circuit comprises resistance R 2, resistance R 3 and electric capacity, one end ground connection of described electric capacity, and the other end is connected with resistance R 3 with resistance R 2 simultaneously.In the present invention, utilize effective combination of resistance and electric capacity, reach the effect of filter shape, its circuit structure is simple, with low cost.
Further, be also connected with resistance R 5 on the output terminal of described operational amplifier, the other end of described resistance R 5 is connected on power supply.
As preferably, described operational amplifier is LM139.
As preferably, the resistance of described resistance R 4 is 6 megohms.
Compared with prior art, the invention has the beneficial effects as follows: the signal to collection of the present invention carries out filter shape and relatively sluggish successively, and wheel speed data under extremely low rotating speed also can not lost, and guarantees the reliability of data.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.Embodiments of the present invention include but not limited to the following example.
[embodiment]
The interface circuit for acceleration transducer as shown in Figure 1, it comprises plastic filter circuit and operational amplifier; Between the in-phase input end of described operational amplifier and output terminal, be connected with resistance R 4; The in-phase input end of described operational amplifier connects on the negative pole of diode, the plus earth of described diode; Between the input port of described plastic filter circuit and power supply, be connected with resistance R 1, the output terminal of described plastic filter circuit is connected on the in-phase input end of operational amplifier.
Described plastic filter circuit comprises resistance R 2, resistance R 3 and electric capacity, one end ground connection of described electric capacity, and the other end is connected with resistance R 3 with resistance R 2 simultaneously.
On the output terminal of described operational amplifier, be also connected with resistance R 5, the other end of described resistance R 5 is connected on power supply.
Described operational amplifier is LM139.
The resistance of described resistance R 4 is 6 megohms.
The course of work of the present embodiment is as follows:
Operational amplifier and resistance R 4 form hysteresis comparator circuit, and the voltage of diode pair operational amplifier in-phase input end carries out clamper, avoids overtension to damage operational amplifier.Wheel wheel speed information enters from one end of resistance R 2, successively through filtering shaping circuit and hysteresis comparator circuit, can effectively guarantee not losing of data, even in the situation that tach signal is extremely low, guarantees the reliability of data.
According to the above embodiments, can well complete the present invention.
Be as mentioned above embodiments of the invention.The present invention is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (5)
1. for the interface circuit of acceleration transducer, it is characterized in that: it comprises plastic filter circuit and operational amplifier; Between the in-phase input end of described operational amplifier and output terminal, be connected with resistance R 4; The in-phase input end of described operational amplifier connects on the negative pole of diode, the plus earth of described diode; Between the input port of described plastic filter circuit and power supply, be connected with resistance R 1, the output terminal of described plastic filter circuit is connected on the in-phase input end of operational amplifier.
2. the interface circuit for acceleration transducer according to claim 1, is characterized in that: described plastic filter circuit comprises resistance R 2, resistance R 3 and electric capacity, one end ground connection of described electric capacity, and the other end is connected with resistance R 3 with resistance R 2 simultaneously.
3. the interface circuit for acceleration transducer according to claim 1 and 2, is characterized in that: on the output terminal of described operational amplifier, be also connected with resistance R 5, the other end of described resistance R 5 is connected on power supply.
4. the interface circuit for acceleration transducer according to claim 1, is characterized in that: described operational amplifier is LM139.
5. the interface circuit for acceleration transducer according to claim 1, is characterized in that: the resistance of described resistance R 4 is 6 megohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501765.9A CN103529241A (en) | 2013-10-23 | 2013-10-23 | Interface circuit for acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501765.9A CN103529241A (en) | 2013-10-23 | 2013-10-23 | Interface circuit for acceleration sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103529241A true CN103529241A (en) | 2014-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310501765.9A Pending CN103529241A (en) | 2013-10-23 | 2013-10-23 | Interface circuit for acceleration sensor |
Country Status (1)
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| CN (1) | CN103529241A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104123760A (en) * | 2014-06-26 | 2014-10-29 | 天津市松正电动汽车技术股份有限公司 | Electric vehicle signal acquisition circuit |
| CN109141495A (en) * | 2018-06-28 | 2019-01-04 | 华为技术有限公司 | Sensor interface apparatus |
| CN109194205A (en) * | 2018-07-25 | 2019-01-11 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of HALL input signal conditioning circuit |
| CN115085732A (en) * | 2022-07-12 | 2022-09-20 | 清智汽车科技(苏州)有限公司 | Signal processing circuit suitable for automobile wheel speed |
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| US3668524A (en) * | 1970-01-19 | 1972-06-06 | Ford Motor Co | Electronic circuit for detecting and evaluating angular acceleration and deceleration of a rotary member |
| JPS57135362A (en) * | 1981-02-17 | 1982-08-20 | Nissan Motor Co Ltd | Electronic speed indicator for vehicle |
| CN1987950A (en) * | 2005-12-23 | 2007-06-27 | 上海派恩科技有限公司 | CAN bus data collector |
| CN101408553A (en) * | 2008-11-11 | 2009-04-15 | 大连理工大学 | Rotary peed-measuring and frequency outputting device |
| CN202217270U (en) * | 2011-09-01 | 2012-05-09 | 中国空间技术研究院 | Bus for useful load subsystem data transmission |
| CN102923185A (en) * | 2012-11-12 | 2013-02-13 | 江苏大学 | Electronic control hydraulic power steering system controller and control method thereof |
| CN103178828A (en) * | 2013-03-16 | 2013-06-26 | 哈尔滨工业大学 | High-order sigma-delta closed-loop accelerometer interface circuit capable of self-checking harmonic distortion |
| CN203519640U (en) * | 2013-10-23 | 2014-04-02 | 成都市宏山科技有限公司 | Acceleration sensor interface circuit |
-
2013
- 2013-10-23 CN CN201310501765.9A patent/CN103529241A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3668524A (en) * | 1970-01-19 | 1972-06-06 | Ford Motor Co | Electronic circuit for detecting and evaluating angular acceleration and deceleration of a rotary member |
| JPS57135362A (en) * | 1981-02-17 | 1982-08-20 | Nissan Motor Co Ltd | Electronic speed indicator for vehicle |
| CN1987950A (en) * | 2005-12-23 | 2007-06-27 | 上海派恩科技有限公司 | CAN bus data collector |
| CN101408553A (en) * | 2008-11-11 | 2009-04-15 | 大连理工大学 | Rotary peed-measuring and frequency outputting device |
| CN202217270U (en) * | 2011-09-01 | 2012-05-09 | 中国空间技术研究院 | Bus for useful load subsystem data transmission |
| CN102923185A (en) * | 2012-11-12 | 2013-02-13 | 江苏大学 | Electronic control hydraulic power steering system controller and control method thereof |
| CN103178828A (en) * | 2013-03-16 | 2013-06-26 | 哈尔滨工业大学 | High-order sigma-delta closed-loop accelerometer interface circuit capable of self-checking harmonic distortion |
| CN203519640U (en) * | 2013-10-23 | 2014-04-02 | 成都市宏山科技有限公司 | Acceleration sensor interface circuit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104123760A (en) * | 2014-06-26 | 2014-10-29 | 天津市松正电动汽车技术股份有限公司 | Electric vehicle signal acquisition circuit |
| CN109141495A (en) * | 2018-06-28 | 2019-01-04 | 华为技术有限公司 | Sensor interface apparatus |
| CN109141495B (en) * | 2018-06-28 | 2020-10-09 | 华为技术有限公司 | Sensor interface device |
| CN109194205A (en) * | 2018-07-25 | 2019-01-11 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of HALL input signal conditioning circuit |
| CN115085732A (en) * | 2022-07-12 | 2022-09-20 | 清智汽车科技(苏州)有限公司 | Signal processing circuit suitable for automobile wheel speed |
| CN115085732B (en) * | 2022-07-12 | 2024-04-30 | 清智汽车科技(苏州)有限公司 | Signal processing circuit suitable for automobile wheel speed |
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Application publication date: 20140122 |